Porsche 911 Bosch Headlight Lenses H4 yellow with Hella Gaskets New 72-94

[vw-museum]

A Pair of yellow Bosch Headlight H4 Lenses for Porsche 911 from 1972-1994

Porsche Part # 911 631 927 00

New Lenses,not used before

including a Pair of new Hella Lens Gaskets

$239 shipped

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[66S]

That part number is for clear lenses. Got the yellow lens part number?

[Xavier PJB]

I thought yellow lenses was only H1. I would think that the color of the lens has nothing to do with the H type. Yellow headlights were mandatory in France from 1936 until 1993. Since January 1993 all new cars had to go with white headlights. However most of the pre 93 cars went white by replacement.
Another point to take into account : until 1993 some car manufacturers, in order to reduce their production costs, put white lenses and make the bulbs yellow.
The Hx lenses were produced to match the bulbs accordingly.
Who knows the production dates of the Hx standard ? This will close the debate on new yellow lenses.